package com.deimos.dataBase;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.HibernateException;


/**
 * @author Gavin King
 */


import org.hibernate.usertype.UserType;

public class EnumUserType<E extends Enum<E>> implements UserType {

	private Class<E> clazz = null;

	protected EnumUserType(Class<E> c) {

		this.clazz = c;

	}

	private static final int[] SQL_TYPES = { Types.VARCHAR };

	public int[] sqlTypes() {

		return SQL_TYPES;

	}

	@SuppressWarnings("unchecked")
	public Class returnedClass() {

		return clazz;

	}

	public Object nullSafeGet(ResultSet resultSet, String[] names, Object owner)
			throws HibernateException, SQLException {

		String name = resultSet.getString(names[0]);

		E result = null;

		if (!resultSet.wasNull()) {

			result = Enum.valueOf(clazz, name);

		}

		return result;

	}

	@SuppressWarnings("unchecked")
	public void nullSafeSet(PreparedStatement preparedStatement, Object value,
			int index) throws HibernateException, SQLException {

		if (null == value) {

			preparedStatement.setNull(index, Types.VARCHAR);

		} else {

			preparedStatement.setString(index, ((Enum) value).name());

		}

	}

	public Object deepCopy(Object value) throws HibernateException {

		return value;

	}

	public boolean isMutable() {

		return false;

	}

	public Object assemble(Serializable cached, Object owner)
			throws HibernateException {

		return cached;

	}

	public Serializable disassemble(Object value) throws HibernateException {

		return (Serializable) value;

	}

	public Object replace(Object original, Object target, Object owner)
			throws HibernateException {

		return original;

	}

	public int hashCode(Object x) throws HibernateException {

		return x.hashCode();

	}

	public boolean equals(Object x, Object y) throws HibernateException {

		if (x == y)

			return true;

		if (null == x || null == y)
			return false;

		return x.equals(y);

	}

}